Note that anti-borg shield have "energy" plasma damage resist, not projectilly, not dot. As a sci plama torp boat im ok with hazard, cause spaming plasma is a good tactic option forcing to waste hazard emitters, that also is usualy the most common and effective hull heal.

What its unballanced is the resist that 2 pieces of borg set have to the dot itself and other sci abilites like FBP that i normally use to blow careless escorts easily, cause it activates the borg regen all the time.